The story is all too familiar: Jamal Khashoggi, a Saudi journalist and a family man, entered Saudi Arabia’s Consulate in Istanbul on Oct. 2 for marriage formalities. No one – not even his fiancee, who was waiting outside the compound — has ever seen him again.

Over the course of the past month, Turkey has moved heaven and earth to shed light on all aspects of this case. As a result of our efforts, the world has learned that Khashoggi was killed in cold blood by a death squad, and it has been established that his murder was premeditated.

Yet there are other, no less significant questions whose answers will contribute to our understanding of this deplorable act. Where is Khashoggi’s body? Who is the “local collaborator” to whom Saudi officials claimed to have handed over Khashoggi’s remains? Who gave the order to kill this kind soul? Unfortunately, the Saudi authorities have refused to answer those questions.

We know the perpetrators are among the 18 suspects detained in Saudi Arabia. We also know those individuals came to carry out their orders: Kill Khashoggi and leave. Finally, we know the order to kill Khashoggi came from the highest levels of the Saudi government.

Some seem to hope this “problem” will go away in time. But we will keep asking those questions, which are crucial to the criminal investigation in Turkey, but also to Khashoggi’s family and loved ones. A month after his killing, we still do not know where his body is. At the very least, he deserves a proper burial in line with Islamic customs. We owe it to his family and friends, including his former colleagues at The Post, to give them an opportunity to say their goodbyes and pay their respects to this honorable man. To ensure that the world will keep asking the same questions, we have shared the evidence with our friends and allies, including the United States.

As we continue to look for answers, I would like to stress that Turkey and Saudi Arabia enjoy friendly relations. I do not believe for a second that King Salman, the custodian of the holy mosques, ordered the hit on Khashoggi. Therefore, I have no reason to believe that his murder reflected Saudi Arabia’s official policy. In this sense, it would be wrong to view the Khashoggi slaying as a “problem” between two countries. Nonetheless, I must add that our friendship with Riyadh, which goes back a long time, doesn’t mean we will turn a blind eye to the premeditated murder that unfolded in front of our very eyes. The killing of Khashoggi is inexplicable. Had this atrocity taken place in the United States or elsewhere, authorities in those countries would have gotten to the bottom of what happened. It would be out of the question for us to act any other way.

No one should dare to commit such acts on the soil of a NATO ally again. If anyone chooses to ignore that warning, they will face severe consequences. The Khashoggi murder was a clear violation and a blatant abuse of the Vienna Convention on Consular Relations. Failure to punish the perpetrators could set a very dangerous precedent.

This is another reason we were shocked and saddened by the efforts of certain Saudi officials to cover up Khashoggi’s premeditated murder rather than serve the cause of justice, as our friendship would require. Though Riyadh has detained 18 suspects, it is deeply concerning that no action has been taken against the Saudi consul general, who lied through his teeth to the media and fled Turkey shortly afterward. Likewise, the refusal of the Saudi public prosecutor — who recently visited his counterpart in Istanbul — to cooperate with the investigation and answer even simple questions is very frustrating. His invitation of Turkish investigators to Saudi Arabia for more talks about the case felt like a desperate and deliberate stalling tactic.

The murder of Jamal Khashoggi involves a lot more than a group of security officials, just as the Watergate scandal was bigger than a break-in and the 9/11 terror attacks went beyond the hijackers. As responsible members of the international community, we must reveal the identities of the puppetmasters behind Khashoggi’s killing and discover those in whom Saudi officials — still trying to cover up the murder — have placed their trust.